210110120012121 has 64 divisors (see below), whose sum is σ = 345361317396480. Its totient is φ = 110935950269760.

The previous prime is 210110120012119. The next prime is 210110120012137. The reversal of 210110120012121 is 121210021011012.

It is a happy number.

It is not a de Polignac number, because 210110120012121 - 2¹ = 210110120012119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210110120012121.

It is not an unprimeable number, because it can be changed into a prime (210110120012021) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2753136 + ... + 20683326.

It is an arithmetic number, because the mean of its divisors is an integer number (5396270584320).

Almost surely, 2^{210110120012121} is an apocalyptic number.

210110120012121 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

210110120012121 is a deficient number, since it is larger than the sum of its proper divisors (135251197384359).

210110120012121 is a wasteful number, since it uses less digits than its factorization.

210110120012121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17930946.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 210110120012121 its reverse (121210021011012), we get a palindrome (331320141023133).

The spelling of 210110120012121 in words is "two hundred ten trillion, one hundred ten billion, one hundred twenty million, twelve thousand, one hundred twenty-one".